Which sum equalas 11 over 12

answer:

a =1 ,b =1 ,c =0 , d =-2k   and e =

step-by-step explanation:

equation of circle with radius 3 units and center on y axis is always of the form

where   r = 3

on simplifying it we get

=0

on comparing it with given general equation we get

a =1 ,b =1 ,c =0 , d =-2k   and e =

where k can be any real number

answer:

28 quarters and 40 dimes

step-by-step explanation:

q=x

d=x+12

0.25(x)+0.10(x+12)=11.00

0.25x+0.10x+1.2=11.00

0.35x=9.80

x=28

q=x=28

d=x+12=28+12=40

answer:

45.44/71 - 1 = -0.36 = -36%

36% decrease.

answer:

x = 0 or x = -9

step-by-step explanation:

given equation is :

x²+18x = 9x

adding -9x to both sides of above equation,we get

x²+18x-9x = 9x-9x

add like terms

x²+9x = 0

make factors

x(x+9) = 0

applying zero-product property to above equation , we get

x = 0 or x+9 = 0

x = 0 is one of solution of x²+18x = 9x.

now, x+9 = 0

adding -9 to both sides of above equation , we get

x+9-9 = 0-9

x+0 = -9

x = -9

hence, the solution of x²-18x= 9x is {0,-9}.